For both iSCSI initiator and target increase socket buffer sizes before

establishing connection.

This is a workaround for Chelsio TOE driver, that does not update socket
buffer size in hardware after connection established, and unless that is
done beforehand, kernel code will stuck, attempting to send/receive full
PDU at once.

MFC after:	1 week

2 files changed, 10 insertions, 1 deletions

diff --git a/usr.sbin/iscsid/iscsid.c b/usr.sbin/iscsid/iscsid.c
index a7f489e..a6feb6a 100644
--- a/usr.sbin/iscsid/iscsid.c
+++ b/usr.sbin/iscsid/iscsid.c
@@ -160,7 +160,7 @@ connection_new(unsigned int session_id, const uint8_t isid[8], uint16_t tsih,
 #ifdef ICL_KERNEL_PROXY
 	struct iscsi_daemon_connect idc;
 #endif
-	int error;
+	int error, sockbuf;
 
 	conn = calloc(1, sizeof(*conn));
 	if (conn == NULL)
@@ -237,6 +237,14 @@ connection_new(unsigned int session_id, const uint8_t isid[8], uint16_t tsih,
 		fail(conn, strerror(errno));
 		log_err(1, "failed to create socket for %s", from_addr);
 	}
+	sockbuf = SOCKBUF_SIZE;
+	if (setsockopt(conn->conn_socket, SOL_SOCKET, SO_RCVBUF,
+	    &sockbuf, sizeof(sockbuf)) == -1)
+		log_warn("setsockopt(SO_RCVBUF) failed");
+	sockbuf = SOCKBUF_SIZE;
+	if (setsockopt(conn->conn_socket, SOL_SOCKET, SO_SNDBUF,
+	    &sockbuf, sizeof(sockbuf)) == -1)
+		log_warn("setsockopt(SO_SNDBUF) failed");
 	if (from_ai != NULL) {
 		error = bind(conn->conn_socket, from_ai->ai_addr,
 		    from_ai->ai_addrlen);
diff --git a/usr.sbin/iscsid/iscsid.h b/usr.sbin/iscsid/iscsid.h
index b05c222..9ad3325 100644
--- a/usr.sbin/iscsid/iscsid.h
+++ b/usr.sbin/iscsid/iscsid.h
@@ -44,6 +44,7 @@
 #define	CONN_DIGEST_CRC32C		1
 
 #define CONN_MUTUAL_CHALLENGE_LEN	1024
+#define	SOCKBUF_SIZE			1048576
 
 struct connection {
 	int			conn_iscsi_fd;